Clear Blue Evaporation Line On Pregnancy Test - State Police Blotter Nyindexindeed Careers Charlotte Nc Many home pregnancy tests have two lines: A control line and a test line. The control line will appear every test, even if youโre not pregnant. The test line should only appear. On a blue dye test, the line can appear as gray or even a lighter shade of blue. For some reason, anecdotally, many mamas find that blue dye tests are more prone to.
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